Mr. Stewart as stated above. I have had mine three years and in fact run two at a time now. Jim is great with his help and honest as it comes. He has no secrets. I went to his house for about a half day before I bought one and he showed me everything he does.
As stated above, have a lead source, it's getting harder to find. If you go forward, I will be happy to help you in any way. As will several others who post here.
My set up is "fancy", I'm a tinkerer with a good shop. Last run was 800# in about 5 hours through two machines, BUT, BUT, BUT that's just running shot. Now I have to grade, rinse, dry, graphite and bottle. I touch every pound of shot 11 times in the process. It is labor intensive. AND WORTH IT!!
My set up cost me about $1200 total (2-makers, coolant, pumps, screens, graphite equip, and etc.) and with wheel weights costing about $40 for a five gallon bucket, I still run shot for about $12 for 25#.
Keep my name and let me know if I can help.